Abstract:
Spectral albedo measurements on sea ice during the third CHINARE expedition with the Chinese ice breaker MS Xuelong in the Chukchi Sea from 20 to 29 August 2008.Each measurement type (incident, reflected) was made with a different TriOS Ramses spectroradiometer. These sensors are known to have calibration issues at the longest and shortest wavelengths for which data are reported; we recommend ... using only data from about 350 to 920 nm. No significant quality control has beendone to these data. Station descriptions: Ia, 20 Aug. 15:00 to 21 Aug. 07:30, Level ice with open melt pond near by, zi: 2.8m, fb: 34 cm, zs: 2-3 to 9 cm. Ib, 21 Aug. 10:30 to 22 Aug. 21:50, Same as Ia, just re-installed after station fell over. II, 22 Aug. 23:00 to 25 Aug. 02:40, Over refrozen melt pond and level ice, increasing amount of snow on melt pond with time (snow drift). III, 25 Aug. 03:50 to 25 Aug. 05:20, Half over snow, half over melt pond, station fell over after short time, zs: 7 cm. 25 Aug. 05:20 to 26 Aug. 08:40, No useful data, station fallen over. IV, 26 Aug. 08:40 to 29 Aug. 00:20, Set-up over open lead, other activities close by, zs: 9 cm, changing cloud cover, new ice formation in lead (5-7 cm at end).